Quote from Not_NishI think the definition of a sport would be any form of organized, competitive physical or mentally challenging activity with a regulatory body and a universally accepted set of rules? While its true that Sky diving by itself may not be a sport, there is competitive sky diving that is judged on certain criteria, so that part of it should be (and is) considered a sport.
Thats why Parkour has fought against being labelled a sport. Large parts of the Parkour community have been against the idea of it being a sport, because it is based on personal physical discipline rather than competition. However, if it became an organized system of practitioners competing against each other with a set of rules and an enforcing body, then it would automatically become a sport, much like competitive skateboarding and MotoGP.
Pretty much this. I would think a sport would require some sort of mental and/or physical fitness. I wouldn't classify video games as a sport because of that.
"Oh you're an athlete? What do you do?"
"I play Call of Duty."